Valve.



J.R.D0LPH. VALVE.

APPLICATION FILED DEG. 6,190.7f

Panama Jan. 5, 1909.

UNITED sTATEs PATENT oEEroE.

JAMES R. DOLPH, OF BUFFALO, NEW YORK, ASSIGNOR OF ONE-HALF TO JAMES I.BARKER, OF BUFFALO, NEW YORK.

VALVE Specification of Letters Patent.

Patented Jan. 5, 1909.

Application filed December 6, 1907. Serial No. 405,401.

To all whom fit may concern:

Be it known that I, JAMES R. DoLPH, a citizen of the United States,residing at Buffalo, in the county of Erie and State of New York, haveinvented certain new and useful Improvements in Valves, of which thefollowing is a specication.

My invention relates to valves, and more particularly to that type ofvalve known as gage-cocks; it having for its primary object provisionfor closing both the inlet and outlet of the valve-casing.

Another object of my invention is to provide two valves and cooperatingvalve-seats, and means whereby one of said valves may be removed forregrinding while the other is closed against its seat; to provide arotatable conical valve and a slidable valve working in conjunctiontherewith; and to otherwise improve on valves of this type.

To these ends the invention consists in the construction, arrangementand combination of parts to be hereinafter described and particularlypointed out in the subjoined claims.

In the drawings in which my invention is embodied in the form of' agage-cock,- Figure l is a side elevation of the same threaded into thewall of the boiler. Fig. 2 is a central longitudinal section showingboth valves in closed position. Fig. 3 is a similar view showing bothvalves open. Fig. 4L is a cross-section taken on line t-A, Fig. 2. Fig.5 is an enlarged detached perspective view of the combined slide-valveseat and outlet-nozzle. Fig. 6 is an enlarged perspective view of theslide-valve.

Referring now to the drawings in detail, like letters of reference referto like parts in the several figures.

A represents the wall of the boiler into which the gage-cock B isthreaded. In the particular embodiment herein shown, said cock comprisesa hemispherical body C from which extends an entrance tube D having athreaded portion E which is threaded into the wall of the boiler. Thebody is provided with a threaded portion F onto which a cap G isthreaded, said cap having an externally threaded extension g and beingprovided with a threaded central bore H. The interior of the body iscored out to form a square chamber I which is separated from the tube Dby a partition J in which is formed an inlet-opening, ground to form abevel valve-seat K.

L designates a valve-rod having a conical valve Z at its inner end, acollar M a short distance from said valve, and screw-threads N adjacentsaid collar which are adapted to thread into the centrally threaded boreH of the cap Gr. At the end of the eXtension g of said cap, apacking-box O of common construction is provided, thus preventingleakage at such point.

The body of the gage-cock has a lateral boss P which is cored out andtapped to receive a threaded outlet-nozzle Q. whose inner end is flatand serves as a valve-seat for a slide-valve R held between the valve Zand the collar M on the valve-rod, so that when the latter is revolvedit moves the slidevalve on its valve-seat, closing the outlet Sextending centrally through the nozzle Q. The slide-valve is providedwith a longitudinal groove r in which the valve-rod fits, and said valveis therefore held against lateral movement, while the valve Z and collarM prevent its moving lengthwise on the valve-rod.

As clearly shown in Figs. 2 and 4, the slide-valve is smaller than thethreaded nozzle Q, so that upon unscrewing said nozzle from the body ofthe gage-cock, the slide-valve may be removed. In this manner either theslide-valve or the inner flat end of the outlet-nozzle Q may be regroundto provide a secure seating for the slidevalve; or, if necessary, bothsaid valve and said nozzle may be reground. When the gage-cook is in usethe conical-valve I is normally unseated and the slide-valve R closesthe passage S. In order to ascertain the level of the water in theboiler, or when it is desired to open the outlet-opening in the nozzle Qfor any other reason, the valverod L is unscrewed to cause theslide-valve to be drawn outward. In order to close said slide-valve itis simply necessary to turn the valve-rod in the opposite directionuntil the flow of steam or water is shut-o, and when in this position,the conical-valve remains unseated. If for any reason it is foundnecessary or desirable to regrind the slidevalve or its seat, thevalve-rod may be rotated to bring the conical-valve Z securely againstits seat, after which the outlet-nozzle Q, may be unscrewed and theslide-valve removed through the opening in which said nozzle is held.The water or steam in the boiler cannot therefore escape while thethreaded into its receiving-opening, so that at all times, its innerflat end will provide a proper seat for the slide-valve R. The doublevalve arrangement makes it possible to regrind the slide-valve at anytime without the slightest reduction of steam pressure in the boiler, sothat when the valve-seat-v becomes worn it will not be necessary to waituntil the boiler is out of use before regrinding.

Having thus described my invention, what I claim is,-

1. In a valve, the combination with a casing having an inlet and anoutlet, of a valvestem havinga valve closing said inlet and a flat-valveclosing said outlet, said flat valve being removable through said outletwhen said conical valve closes said inlet.

2. In a valve, the combination with a casing having an inlet and aremovable member provided with an outlet and a valve-seat, of arotatable valve-rod threaded to provide combined longitudinal androtatable movement, a valve at the end of said valve-rod adapted toclose said inlet, and a slide-valve actuated by the valve-rod andadapted to close the outlet in said removable member.

8. In a valve, the combination with a casing having a cap and an inlet,of a valve-rod threaded into said cap and having a valve at its innerend adapted to close said inlet and a collar a short distance from saidvalve, a nozzle threaded into said casing and having its inner end fiatand serving as a valve-seat, said nozzle having an outlet-passageextending from end to end thereof, and a slidevalve held between theconical valve and the collar on said valve-rod and adapted to seatagainst the flat inner end of said nozzle, said .nozzle being removablefrom the valve-casing and said slide-valve being removable through theopening in which said nozzle is held.

el. In a valve, the combination with a casing having an inlet and aremovable nozzle provided with a outlet-passage and having its inner endserving as a valve-seat, of a valve-rod threaded for movement in saidcasing and having a conical valve at its inner end adapted to close saidinlet and a shoulder a short distance from said conical valve, aslide-valve having a longitudinal groove in which said valve-rod fits,said slide-valve being held between said conical-valve and the collar onsaid valve-rod and adapted to bear against and slide'on the inner faceof said nozzle so as to close the outlet passage therein.

5. In a valve, the combination with a casing having an inlet and alateral outlet, of a rotatable and longitudinally movable valvestemhaving a valve for closing said inlet and carrying a slide valve forclosing said outlet, said slide valve being removable from said stem.

In testimony whereof, I have afliXed my signature in the'presence of twosubscribing witnesses.

JAMES DOLPH.

Witnesses .ELLA C. PLUnoKi-IAHN,

Earn. NEUHART.

